So will what's happening in England have no bearing at all on what happens in Wales?

The dispute between the junior doctors, the NHS in England and the UK government is extremely complex.

But generally speaking, it centres around introducing new working conditions including changing the way junior doctors are paid for working on weekends.

The UK government insists the new contract means the NHS in England will be better placed to provide better care seven days a week. But the BMA insists it will increase the pressure on junior doctors and result in a less safe care for patients.

So to what extent do junior doctors in Wales back the position of the BMA in England?

Generally, junior doctors in Wales support their colleagues in England.

BMA Wales said: "We fully support our colleagues in England who have planned industrial action. We are one profession, and we stand together.

"Across the UK, the BMA wants a contract that is fair for doctors, safe for patients and safeguards the future of the NHS everywhere.

"This is well supported: the BMA's ballot of its members received a near unanimous vote for industrial action in England. The approach taken by the government in England is an attack on us all."

There has previously been support for the action from Welsh rugby star Jamie Roberts. He is a qualified doctor, although has never worked as one. He's currently playing for Harlequins and studying for a MPhil at Cambridge.

He tweeted during the first strike: "The #juniordoctors have my full support today."

The former surgeon and manager of the University Hospital of Wales in Cardiff also said he intended to hand back his fellowship of the organisation.

The BMA responded: "Everyone is entitled to their view and junior doctors certainly do not take the decision to take industrial action lightly."

What does the Welsh Government say?

Ahead of the latest proposed action, the Welsh Government has issued a statement.

"We prefer dialogue and agreement over dispute and imposition and we will not impose a junior doctors contract here in Wales," said a spokesman.

"Wales has a strong tradition of working in partnership with our staff and their representatives and we've had constructive talks with BMA Cymru regarding the ongoing dispute in England.

"We welcome their plans to survey junior doctor members to judge their mood in relation to the contract situation.

"We will only move to discuss a new contract for junior doctors when we judge the time is right. In the meantime, we continue to offer attractive working arrangements and a positive training experience, based on the existing contractual arrangements."

The spokesman said they would also "seek to ensure there is no adverse impact" on Welsh patients who would routinely access emergency and planned care service at English hospitals.